摘要
在硝酸铈铵引发下,将1-乙烯基-3-氨乙基咪唑氢溴酸盐([VAIm]Br·HBr)固载于3-氨丙基三甲氧基硅烷改性后的介孔二氧化硅(MSN-NH_(2))表面,再用KOH处理制备了MSN-NH-[VAIm]OH催化剂。并采用FTIR、TG、N_(2)吸附-脱附和XRD等方法进行了表征。实验结果表明,基于0.5g的MSN-NH_(2)载体的较优制备条件为1.4mmol[VAIm]Br·HBr、0.20g硝酸铈铵、40℃和12 h,将制备得到的MSN-NH-[VAIm]OH应用于催化苯甲醛和丙二腈的Knoevenagel反应,苯甲醛转化率和苯亚甲基丙二腈的选择性分别高达99.0%和100%,催化剂可稳定循环使用5次以上。
Under the initiation of ammonium cerium nitrate,1-vinyl-3-aminoethylimidazole hydrobromide([VAIm]Br·HBr)was immobilized on the surface of mesoporous silica modified by 3-aminopropyltrimethoxysilane(MSN-NH_(2)),and then treated with KOH to prepare MSN-NH-[VAIm]OH catalyst.The catalyst was characterized by FTIR,TG,N_(2) adsorption-desorption and XRD.The experimental results show that based on 0.5 g MSN-NH_(2),the optimal conditions for MSN-NH-[VAIm]OH preparation are 1.4 mmol[VAIm]Br·HBr,0.20 g ammonium cerium nitrate,40℃and 12 h.For the Knoevenagel reaction of benzaldehyde and malononitrile catalyzed with the prepared MSN-NH-[VAIm]OH,the conversion of benzaldehyde and the selectivity for benzylmalononitrile are as high as 99.0%and 100%,respectively.In addition,the catalyst can be stably recycled for more than 5 times.
作者
张卫红
邹凯
管琪雯
刘平
ZHANG Weihong;ZOU Kai;GUAN Qiwen;LIU Ping(School of Petrochemical Engineering,Changzhou University,Changzhou 213164,China)
出处
《石油化工》
CAS
CSCD
北大核心
2024年第2期154-160,共7页
Petrochemical Technology
基金
江苏省绿色催化材料与技术实验室开放课题项目(BM2012110)。
